Improving validity and reliability in STAT 2000 assessments
Jansen, Gregory Gerard
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STAT 2000 is the introductory statistics course given at the University of Georgia and is taken by 1300 students each fall and spring semester. This thesis analyzes the reliability and validity of the third and fourth tests given in the spring 2012 and fall 2012 semesters. The reliability coefficients for the fall tests, after the introduction of a new validity check that included a more direct analysis of the questions as well as the tests themselves, were compared to the reliability of the spring tests. The new validity check increased reliability for both tests, and the reliability for test four was significantly higher in the fall than for the spring. While further improvements can be made, this formal validity check can increase the reliability and improve the assessments and the instructors’ understanding of the students’ understanding.